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annotate rogue4/chase.c @ 211:382ff498acdd

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Initialize some more pointers for the benefit of MSVC. There should be no more errors with Visual Studio 2015, in Debug or Release mode.
author John "Elwin" Edwards
date Thu, 21 Jan 2016 21:10:23 -0500
parents 9535a08ddc39
children 1b73a8641b37
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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12
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1 /*
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2 * Code for one creature to chase another
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3 *
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4 * @(#)chase.c 4.25 (Berkeley) 5/5/82
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5 *
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6 * Rogue: Exploring the Dungeons of Doom
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7 * Copyright (C) 1980, 1981, 1982 Michael Toy, Ken Arnold and Glenn Wichman
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8 * All rights reserved.
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9 *
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10 * See the file LICENSE.TXT for full copyright and licensing information.
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11 */
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12
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13 #include <curses.h>
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14 #include "rogue.h"
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15
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16 #define DRAGONSHOT 5 /* one chance in DRAGONSHOT that a dragon will flame */
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17
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18 coord ch_ret; /* Where chasing takes you */
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19
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20 /*
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21 * runners:
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22 * Make all the running monsters move.
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23 */
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24 runners()
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25 {
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26 register THING *tp;
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27 register THING *ntp;
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28
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29 for (tp = mlist; tp != NULL; tp = ntp)
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30 {
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31 ntp = next(tp);
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32 if (!on(*tp, ISHELD) && on(*tp, ISRUN))
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33 {
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34 if (!on(*tp, ISSLOW) || tp->t_turn)
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35 if (do_chase(tp) == -1)
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36 continue;
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37 if (on(*tp, ISHASTE))
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38 if (do_chase(tp) == -1)
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39 continue;
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40 tp->t_turn ^= TRUE;
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41 }
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42 }
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43 }
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44
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45 /*
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46 * do_chase:
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47 * Make one thing chase another.
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48 */
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49 do_chase(th)
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50 register THING *th;
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51 {
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52 register struct room *rer, *ree; /* room of chaser, room of chasee */
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53 register int mindist = 32767, i, dist;
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54 register bool stoprun = FALSE; /* TRUE means we are there */
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55 register char sch;
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56 register bool door;
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57 register THING *obj;
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58 register struct room *oroom;
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59 coord this; /* Temporary destination for chaser */
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60
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61 rer = th->t_room; /* Find room of chaser */
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62 if (on(*th, ISGREED) && rer->r_goldval == 0)
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63 th->t_dest = &hero; /* If gold has been taken, run after hero */
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64 if (th->t_dest == &hero) /* Find room of chasee */
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65 ree = proom;
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66 else
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67 ree = roomin(th->t_dest);
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68 /*
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69 * We don't count doors as inside rooms for this routine
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70 */
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71 door = (chat(th->t_pos.y, th->t_pos.x) == DOOR);
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72 /*
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73 * If the object of our desire is in a different room,
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74 * and we are not in a corridor, run to the door nearest to
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75 * our goal.
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76 */
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77 over:
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78 if (rer != ree)
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79 {
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80 for (i = 0; i < rer->r_nexits; i++) /* loop through doors */
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81 {
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82 dist = DISTANCE(th->t_dest->y, th->t_dest->x,
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83 rer->r_exit[i].y, rer->r_exit[i].x);
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84 if (dist < mindist)
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85 {
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86 this = rer->r_exit[i];
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87 mindist = dist;
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88 }
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89 }
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90 if (door)
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91 {
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92 rer = &passages[flat(th->t_pos.y, th->t_pos.x) & F_PNUM];
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93 door = FALSE;
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94 goto over;
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95 }
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96 }
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97 else
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98 {
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99 this = *th->t_dest;
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100 /*
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101 * For dragons check and see if (a) the hero is on a straight
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102 * line from it, and (b) that it is within shooting distance,
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103 * but outside of striking range.
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104 */
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105 if (th->t_type == 'D' && (th->t_pos.y == hero.y || th->t_pos.x == hero.x
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